Date of this Version
Physical Review Letters
It is shown that the expansion in density of spin deviations for the Heisenberg antiferromagnet at low temperatures leads to a 1/z expansion for the free energy. In contrast to the 1/S expansion, the kinematic properties of spin operators are realized within each order of the expansion. The spin-wave energy at long wavelength is also calculated.
Harris, A. (1968). 1/z Expansion for the Heisenberg Antiferromagnet at Low Temperatures. Physical Review Letters, 21 (9), 602-604. http://dx.doi.org/10.1103/PhysRevLett.21.602
Date Posted: 20 August 2015
This document has been peer reviewed.